题目内容
In polar areas, if a vessel is operating 10 nautical miles from shore within range of shore-based VHF station, what area the vessel is operating within?
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Ships sailing in area A 2 will at least be capable of transmitting a ship-to- shore alert on ______.
In addition to meeting the requirement of sea area A1 and A2, every ship engaged on voyage in sea area A4 shall be provided with ______.
Which radio equipment is not necessary for the ships sailing in the sea area A1?
If a ship is in distress in area A3, ship-to-shore distress alerting shall be conducted by means of ______.
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